Protection mechanism for looms.



J. NORTHROP.

PROTECTION MECHANISM FUR Looms.

APPLXCATION FILED IIAR.14,1908` 908,418. Patented Dec. 29, 1908.

2 SHEETS-SHEET 1.

i LUM J. NORTHROP.

PROTECTION MBCHANISM POR LooMs.

APPLIOA'I'ION FILED MAR. 14, 1908y 908,41 8. Patented Dec. 29, 190s.

2 SHEETS-SHEET Z.

PATE N T 0F E IUE.

HOPEDALE, M A SQA (1li UHIITTS.

PROTECTION MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented Dec. 29, 1908.

Application tiled March i4, 1908. Serial No. 421,208,

To all whom it may concern.:

Bc it known that l, JONAs Non'rnnor, n

citizen of the United States, and resident of llopedale, county ol' Worcester, Siete ol Massachusetts, heve invented certnin new :ind useful Improvements in Protection Mechanism for Looms, of which the following is a full, cleftr, und exuct specification. i

To those skilled iu the art of weaving it is well understood that the protection niecbnni ism of a loom serves to stop the loom when for any reason the shuttle fails to box, thus preventing war parts under sutil) conditions.

In power weaving protection mechanism is a necessity unless its place is taken by :i

loose or spring-reed which can yield to the 1 shuttle, but the use of the latter device is infrequent in this country.

With the object of reducing parts the protection mechanism has been so intercon- 'i nected with the shuttle checkingr or binding' means that the adjustment of one aileets the other disedventngeously.

The shuttle binding means per se serres the purpose of checking the shuttle when it enters the box, end must be adjusted to meet variations 1n size, Wenrhtand speed ol this rapidl moving member of aloomstructure, lf t 1e shuttle comes home too rapidi)Y the checking action of the binder must be increased. lf the shuttle moves too slowl) into the box the checking action must be decreased by setting the binder outward, in-

creased action consequent upon setting: the

binder inwards resultingr in increased outward movement of the binder by the inmining shuttle, whereas with decreased checkin;r action there will be throw of the binder. Tere the binder l'ree to perform its own functions of checking the shuttle such variations in its adjustment end movement would be unobjectionuble, but the interconnection between the binder Aund the protection mechanism causes variations in the movement of the binder to effect the relation of the dagger withv its frog, in some eases causing smashes of the warp or breathage of parts, and in others causing unnecessary sto page of the loom. the usua direct connection between thehinders and the protection mechanism, tho shut-- tle on entering either box must necessarily snmshes or breakage of e decreased outward l Moreover, with l rotute the protection shnl't und its ntlzu'hed paris, the inertie ol which is verjr considerztble, und such rotniion must be eliected nguinst thc resistance oll :t sprintr ol' sullicient strength Io cnusc return movement olE the shnl't und its nttau'hed pnrts surelv :1nd promptly upon the exit oi' lhe shuttle from the box. This necessitates ndditionztl power in picking the shuttle und results iircxcessive wenn' und brenknge ol' the shuttle itsell` lt is nmnil'estly desirable to use :is light at spring' on the protection slml't ns is compatible with safety, end hence the spring is nd- `justnbl)P applied, but any variation in the strength of such s )ring causes n, corrcsponding rnrintion in tlie checking action of the must always be :ittcnded to utter an adjust- `ment of this spring hns been mede. Yet nnother trouble arises from the pressure of the binder against the shuttle when the loom is stop )ed b v the projection mechanism, und l with tlie shuttle partially in the box. At such times the binder muy be moved outward slightly b v the shuttle, und the dagger will be cimreslunnliitgl)v lifted but not suilicientlyto clenr the shoulder of the frog. YWith thc loom running et full speed the engagement of the dagger with the frog inl stently forces the former to its lowest or oplerutive position and the inner end of the l binder must zuid does necessnrily return to v its nornml position. Under these circumstnnees either the binder or the rein' shuttlel wall, or both, must bend, und ii the shuttle is old it is ver)r liable to breek, although il n'iight other\\'ise lntve lasted indelinitely.

l These nre. ver)Y practical nud renl troubles on every loom, requiring,r more work and greater skill on the mrt ol' loom lixcrs, und increasi ing the numlier ol loom iixers required for n given number of looms. My present invention has for its object the production of protection mechanism so constructed und arranged that the dagger shall be maintained normally in nn inoperative position during nornntl running conditions 1 of the loom und wherein adjustment or change in the net-ion ol' the shuttle-checking or binding menus in no wey varies the opera l tion or adjustment oi' the protection meol1` i onisrn, the functions of the utter being sepa irated `from those of the shuttle checking binder. so that the boxing of the shuttle los means. Conversely, the protection-shaft tially of well knowni or usual construction.

spring may be adjusted atV will without ai"- fecting the boxing of the shuttle, but in this invention the necessity for changing the cfl'eetive strength of this spring does not exist7 as ample spring-pressurc may be always maintained, so that after the lirst adjustment the sprinCr requires no further attention. As a result the binder is left free to attend to its own )articular duty of checking the incom ing shuttle, while the protection mechanism attends to its proper function of stopping the loom when the shuttle fails to box properly, the dagger at other times remaining in nor'- `mail inoperative position and the governing of the protection mechanism by or through the binder being so arranged as to admit of the proper functional action by each instru` mentality.

The binder requires more or less frequent adjustment, according to circumstances, but in my invention after the protection mechanism has been set in the first instance no further changes are needed.

As will appear hereinafter the da ger is normally inoperatively positioned, trat is, it runs in such a position that it will not stop the loom, and it is moved from this position onl when the shuttle is improperly boxed an the loom is to be stopped, consequentlyY the raising and lowering of the dagger on each lay movement is avoided. This ar rangement differs from the usual construction, wherein the protection mechanism is so arranged that unless the dag er is moved to inoperative position on each eat of the lay it will operate to stop the loom.

The various novel features of my invention will be fully described in the subjoined specification and particularly pointed out in the following claims.

FigLu-e 1 is a left hand side elevation of a sufficient portion of a loom, the lay and shuttle-box being shown in section on line 1-], Fig. 2, illustrating one practical embodiment of my invention; Fig. 2 is a top lan view of the left hand end of the lay an its shuttle-box, with some of the adjacent mechanism, the shuttle being shown properly boxed; Fig. 3 is a rear elevation thereof,y

showing a art of the protection mechanism; Fig. 4 is a etail similar to Fig. 1 but showing the lay as nearing front center, the shuttle being properly boxed, so that the protection mechanism is inactive; Fig. 5 is a similar view but showing the protection mechanism about to 'cause loom stoppage, owing to failure of the shuttle to box.

It Will be understood that both of the shuttle-boxes will be of substantial] the same construction, though only one is erein illu`strated, and the lay 1 ,front box-plate 2, coverlate 3, back-wall 4, the shi per 5, Fig. 1, ook-off lever 6 therefor, an the main portion of the frog 7 may be and are all substan- A suitable binder 8 pivotally and ad ustably mounted near its outer end. on the lay at 9 preferably has its inner and provided withfa metallic shoe 1U, which is movable in and out across the top of a boss or guide 11 fixedly mounted on the lay at the back, and havin-g an upright hole l2, see dotted lines Figs. 1, 3, 4 and 5. The guide is so ositioned with relation to the binder that w ien the latter is forced outward by a properly boxed shuttle the shoe 10 covers the u per end of the hole, see Figs. 2 and 4, but if the shuttle'fails to box properly the hole 12 will be left uncovered by the shoe, as in Fig. 5, as the lay moves forward.

Any suitable pressure producing means for the binder may be used, and herein l have shown a bracket 13 fast on the lay carryin a threaded stud 14 provided with an annuigar shoulder 15, F ig. 2, against which rests one end of aspring 16, the other end being positioned on a lug 17 on the binder. By setting the screw-stud 14 in or out the binder pressure is increased or decreased, as required, and the adjustmentmaintained by a check nut 18, a depending guard 19 on the coverplate overhanging the binder and preventing undue outward movement thereof when the shuttle impinges u on the binder.

The protection s iaft 20 is mounted in suite able bearings on the lay and has an attached dagger 21, said shaft in practice having at each end a rearwardly extended arm 22 pivotally connected with the lower end of an u turned link 23, constituting a controller, t upper straight end of the controller slidably entering the hole 12 in the guide 11. A suitable spring 24, fixed at one end and at its other end adjustably attached to the shaft, serves to lift the link 23 when it is free to rise and depress the point of the dagger 21 to coo cratey with the shoulder 25 of the frog W en the loom is to be stopped owing to the shuttle failing to box.

The reg is provided with a riser 27 and a dwell or sup ort 26, which cooperates at times with a ollower 28 adjustably mounted on the dagger at 29, as will now be explained.

Let it be assumed that the loom has been stopped by the action of the protector mechanism and is to be started again, the parts being in position substantially as indicated by Fig. 5. As the lay moves back, the follower 28 rides u the riser 27, lifts the dagger, and lowers t e link 23, so that when the shuttle is picked, the binder will be moved outward by the incoming shuttle as it` is boxed and the shoe 1() will cover the o ening or hole 12 above the end of the contro ler 23, thus maintaining the dagger in raised or inoperative position as the lay moves forward to beat up. As the lay again moves to the rear, the shoe 10 continues to cover the opening. or hole 12 above the controller until the shuttle is picked, which takes place when the lay has carried the dagger to position the follower 2H above the dwell or support 26 ol the frog. Thus as the shuttle moves through the shed and the hole 12 isuneovered by the inward movement of the hinder, the danger is still held in its inope ative or raised. position by the follower riding over the dwell or support 26, and when the shuttle passes into the box on the other side., the shoe 1U of that binder moves over the hole or openingF l2 on that end of the lay, and, as the lay moves forward, revents the controller Z3 on that end of the lily from rising, thus the dagger continues to be held in its raised or .inoperative position so long` as the loom continues in normal workinfhr condition. lt is to be noted. that the dagger is not raised and lowered on each round of la r movement, as heretofore, but under normal working condition when the shuttleis properly boxed on each piek, the dagger remains in its raised or inoperative position, and is only lowered or moved from that position when a shuttle fails to box. For instance, assume that during` the workingr of the loom as above outlined, the shuttle failed to box or properly enter its shuttle boX, thereby endangering a smash". Such action would take place as the lay moves forward from its back position, and the shoe would fail to cover the hole 12 above the controller 23, so that as the follower moves from the dwell or support 26, the dagger would drop into operative posi tion, Fig. 5, under the action of its spring` 24 and knock otfH or stop the loom. On starting the loom again, the follower' 28 lifts the dagger into its inoperative position as the lay moves hack, and the dagger continues to he held in this raised or inoperative position, as hereinbefore pointed` out, so long as the shuttle continues to be properly boxed.

lt will. be perfectlgv evident that the usual inward or outward adjustment of the binder by adjustment of its pivot 9, or the tightening,r or loosening of the binder spring,l 16, will not have the slightest effect upon the protection mechanism, but`will operate entirely upon or through the binder to vary the checking action upon the incoming shuttle, and conversely the effective strength of the spring 24 has no effect upon the checking action. ln other words, the binder performs the functions of a binder, while the pmtec tion mechanism performs its own functions, bul at a certain point in the forward stroke of the lay one or *he other binder assumes control ol' the said mechanism through its eooperation with the corresponding controller 23. Whether the checking action he neavji or light, or the outward movement of the binder be slightly more or less, according to circumstances, proper boxing of the shut tlc will always move the binder outward far enoufrh for the shoe to act upon the con `l with a binder,

troller, the shoe being made of metal to prevent undue wear. lf, however, the shuttle is improperly boxed, the controller is left free Lo move far enough to permit operative positioning of the dagger to ell'eet loom stop page.

The mechanism is very simple, its operation is smooth and automatic, the dag fer is not lowered or moved from its inoperative, position except when required to stop the loom, and after the. protection mechanism is once properly set no subsequent adjustment thereof is required, no matter bow often or in what way the action ol' either or both of the binders is varied by i'ieccssaxfv tuljustments.

My invention is not restricted to the precise construction and arrangement herein shown which. is an illustration of one practiY cal embodiment of my invention. and those skilled in the art may make various modifications without departing from the spirit and scope of my invention as sel forth in the following claims.

Having full) deseribed my invention, what l claim as new and desire to secure by liettcrs latent isi l. In a loom, the combination of a lay, a shuttle-box dis iosed atcaeh end ofthe lay, a dag-ger carried by thel lay, and means ineluding a spring* actuated binder carried by the shnttle--l'nix to maintain the dagger normally in fixed inoperative position during' the entire la;r movement.

2. ,ln a loom, the cfnnbination of a` lay, a shuttle-box disposed at each end of the lay and provided with a s )ringy actuated binder, a. dagger carried by the lay, means tendinel normally to move the dagger into operative position, and means includinglr the binder acting throughout the lay movement duringr normal workingy condition of the loom to restrain the. dagger from any movement responsive to its actuating means.

3. ln a loom, the combination of a lay, a shuttle-lm): disposed at each end of the lay and provided with a spring actuated binder, a dagger carried by the lay, means tending to move the dagger into operative position, means other than the binders for movingl the -tlagger into inoperative position, and means controlled by the binders for holding` the dagger from movement towards operative position when the shuttle is properly boxed.

4. In a loom, the combination of a lav, a

shuttle-box disposed at each end of thel'a",f and havingr a binder, a dagger carried by the lay, means to maintain'the, dagger in its inoperative position during the flight of the shuttle from. one box to the other, and means oontrolled by the binders for preventing any movement of the dagger towards operative position when the shuttle is properly boxed.

5. In a loom, the combination of a la a. shuttle box at each end of the lay provided a dagger mounted on the lay,

lll)

means normally tending to move the dagger into operative position, and means including a part on the shuttle box, to prevent rising or fallingy movement "ol the dagger during lay movement when a shuttle is properly boxed.

ti ln a loom, the comhinatnm of a lay having a shuttle-box, a binder therefor', a binder spring. means to vary the action of the binder upon the shuttle, a dagger mounted on the lay, and means to eiect a uniform fixed inoperative positioning of the dagger th roughout lay movemert independent of variations in the checking action ol' the binder upon the shuttle.`

7. 1n a loom, the combination of a lay having a shuttle box and shuttle checking means, a dagger mounted upon the lay, and means including a part on the shuttle box to effect a uniform control of said dagger during the entire lay movement and iixed positioning irrespective ol' variable action of the shuttle checking means.

8. ln a loom, a lay having a shuttle-box, a'

binder to check the incomingshuttle, and an adjustable hinder-spring, combined with pro-` tection mechanism, incihding a dagger, a device independent of the binder to inoperatively position the dagger during a portion of the forward stroke of the lay, and means governed hy the binder independently of variations in its checking action to retain the dagger without movement in its inoperative position durin theY completion of the forward stroke o the lay when the shuttle is n'opcrly boxed, whereby adjustment of the binder action has no etect on the operation of the 1protection mechanism.

9. ln a loom, protection mechanism including n. dagger, means to normally hold .said dagger from movement towards operative position during the entire cycle of lay movement, and means includinga spring controlled binder to effect 4operative positioning of the dagger when the shuttle is improperly boxed.

10. ln a loom, a lay having a shuttle-box, a binder therefor, and adjustable pressureproducing means for the binder, combined with protection mechanism for the loom inl cluding a dagger carried by the lay, and means to eiiect uniform control of said dagger by or through the binder to prevent movement of the dagger towards operative position upon proper boxing of the shuttle irrespective of variations in the adjustment of the binder'.

11. In a loom, a lay having a shuttle-box, an adjustable spring controlled binder therefor, protection mechanism for the` loom, means independent of the binder to render said mechanism inoperative rior to the entrance of the shuttle into the ox, and means governed by the binder to cooperate with and retain said protection mechanism in a fixed inoperative position when the' shuttle is properly boxed.

l2. In a loom, a lay having a shuttle-box, a binder therefor, means to vary the pressure of the binder upon thc' shuttle, protector mechanism including a dagger carried by the lay, and means independent of variations in binder movement duc to variation of .binder pressure vl'or controlling operative and inoperative positioning ol' the dagger.

13. ln a loom, a lay, irotcction mechanism, including a rock-shait carried by the la f and having an attached dagger, a frog with which the dagger cooperates to effect loom stoppage, means independent of the binder to move the dag er to inoperative position for a 'fixed part 0 each forward stroke of the lay, a spring coperating with the rock-shaft to operatively position the dagger, shuttlechecking means, and a controller operatively connected with the rock-shaft and coperating with the shuttle-checking means when- ,l

ever the shuttle is properly boxed, to retain the dag er without movement in its inoperative osltion during the remainder of the forwarfi)stroke of the la-y. 14. The combination, with a lay having a shuttle-box, a binder therefor, and an adjustable binder-spring, of protection mechanism for the loom, a controller operatively connected therewith, a guide on the lay in which the controller is movable, the hinder moving across the guide and acting as a detent for the controller Whenever the shuttle is properly boxed, and means to act upon the protection mechanism and render it inoperativeprior to boxing of the shuttle, thereby retracting the controller out of the binder path, the binder uncovering the guide and permittin return movement of the controller if ie shuttle is improperly boxed, to thereb enable the protection mechanism to effect oom stoppage.

15. The combination, with a lay having a shuttle-box, a binder, and means to var the actionthereof upon an incoming shntt. e, of protection mechanism for the loom including a dagger, means to inoperatively position said mechanism when the shuttle is picked, and a controller retracted by such positioning of the protection mechanism, outward movement of the binder by a properly boxed shuttle maintaining the controller retracted and the dagger in xcd inoperative position thereby preventing the operation of the protection mechanism to stop the loom.

16. In a loom, a lay, an adjustable binder to cooperate with and check the flight of a shuttle, protection mechanism including u dagger on the lay adapted to effect stoppage of the loom, and means acting in conjunction with the binder to maintain said mechanism inoperative, and the dagger in fixed osition irrespective of binder adjustment, W en the shuttle is properly boxed.

17.` In a loom, in combination, adjustable shuttle-checking means, protection mechan- Hits ism tor the loom, means to render said operate mechanisnl inoperative as the shuttle is picked, and other means governed by the checking means to retain said protection mechanism in ixcd inoperative position with respect to the lay when the shuttle is properly boxed both said means` coacting to maintain the protection mechanisn'i in'- operative throughout lay movement.

1S. ln a loom, in combination, shuttle checking means, protection mechanism for the loom, means to render said mechanism inoperative as the shuttle is picked, and a controlling member operatively connected with and moved into prct'tetermincd position b v the protection mechanism when the latter is rendered inoperative, the checking means coi'iperating with said controlling` member and maintaining it in such predetermined tixed position only when the shuttle is properly boxed.

1t). In a loom, protection mechanism including a dagger, and a. controlling member movable automatically into and out ot' operative position upon similar movements of the dagger. combined with means to i11- opcratively position the dagger at a predetermined point on each pick, and shuttle cheeking means to cot'iperatc with said controlling member and retain it and the dagger in a fixed inoperative position relative to thc lay only when the shuttle is properly boxed.

2U. in a looln, protection mechanism including a dagger, and. a spring to tmcrativel)Y position it, a controller operatively connected with said mechanism and moved into and out of operative position as the dagger is moved into and out of operative position, and means to inoperativcly position said controller and dagger on cach pick, combined with a shuttle binder, and an adjustable pressure-produeing spring cot'ipcrating therewith, outward movement of the binder by a properly boxed shuttle eii'eeting cooperation between the binder and controller to retain the latter, and thereby the dagger, in their inoperative positions without movement relative to the lay as the piek is com ileted.

2] n a loom, a lay having a shuttle-box, and shuttle-checking means, combined with protection mechanism for the loom includmg a dagger, and means to effect uniform control of said mechanism during the entire forward and backward movement of the lay by or through the checking means irrespective of variable action of thc latter to maintain the dagger from movement towards operative position.

22. In a loom, in combination, shuttlechecking means, protection mechanism for the loom, means to render said mechanism inoperative prior to the entrance of the` shuttie into the box, and other means governed by the checking means to eobined with protection with and retain said protection mechanism inoperative without movement when the shuttle is properly boxed.

23. in a loom, a lay having a shuttle-box, and u. binder, combined with protection mechanism, including a dagger, means to in(poratively.position the dagger prior to the entrance of the shuttle into the shuttle-box, and separate means governed through the binder to retain the dagger without movement inoperatively positioned when the shuttle is boxed properly.

24. ln a loom, a lay having a shuttle-box, and. a binder cooperating therewith, commechanism including a dagger and a frog, means to lift the dagger above the frog prior to the entrance of the shuttle into the shuttle-box and separate means rendered oierative by cooperation of the binder an( shuttle to retain the dagger in fixed. lifted position when the shuttle is properly boxed.

2. ln a loom, thc combination of a lay, a shuttle-box disposed at each end thereo'r1 and provided with. a binder, a dagger carried by the lay, means to maintain the dagger withont movement in its inoperative position during the Ilight of thc shuttle from one box to the other, and other means to continue the dagger in its inoperative position when the shuttle is properly boxed, such other means inclmling controlling members moved out ol' the binder paths by inoperative positioning of the dagger, proper boxing of the shuttle disposing a binder across the adjacent controlling member and acting through it to retain the dagger inoperatively positioned until thel shuttle is picked.

26. vln a loom, the combination of a lay having a shuttle-box, a binder therefor, a binder spring, a dagger mounted on the lay, a spring to operatively position the dagger, means to maintain the dagger inoperative and without movement during the llight of the shuttle, and other means to continue the dagger in inoperative position when the shuttle properly boxed, such other means including a controlling member movable into and out olI the binder path and retracted therefrom by the Iirst mentioned means,

proper boxing oi' the shuttle moving the binder over the end ol` and retaining the controlling member retracted to continue the dagger in inoperative osition until the shuttle is picked, where y the dagger and binder springs are prevented from working against cach other.

27. in a loom, the cmnbination of a lay having a shuttle-box, a binder therefor, a binder spring, a dagger ,mounted on the lay, a spring to operativelv position the dagger, means to maintain t 1e dagger inoperative and without movement during the flight of the shuttle, and other means to continue the dagger in inoperative position when the shuttle is properly boxed, such other means g nuque tu this Spvcifffatinu in thv presenwI Gf mcludmf u member tu un() @wie with [hu tw; subscrlblng wailnvssvs. binder and rdf-1in *ahw dwmer inupemfvelv l L* n L u. Y hb f u Af S T `r w 1' 5 posgmuned While Prewutmg the dagger und J` IX L' DU'RHhUl 5 bmder springs iron; :mung ugmns auch; lncse:

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